SixthSense: a wearable gestural interface
ACM SIGGRAPH ASIA 2009 Sketches
Airwriting recognition using wearable motion sensors
Proceedings of the 1st Augmented Human International Conference
Imaginary interfaces: spatial interaction with empty hands and without visual feedback
UIST '10 Proceedings of the 23nd annual ACM symposium on User interface software and technology
Using mobile phones to write in air
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
3D space handwriting recognition with ligature model
UCS'06 Proceedings of the Third international conference on Ubiquitous Computing Systems
uTrack: 3D input using two magnetic sensors
Proceedings of the 26th annual ACM symposium on User interface software and technology
Airwriting: a wearable handwriting recognition system
Personal and Ubiquitous Computing
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We demonstrate our airwriting interface for mobile hands-free text entry. The interface enables a user to input text into a computer by writing in the air like on an imaginary blackboard. Hand motion is measured by an accelerometer and a gyroscope attached to the back of the hand and data is sent wirelessly to the processing computer. The system can continuously recognize arbitrary sentences based on a predefined vocabulary in real-time. The recognizer uses Hidden Markov Models (HMM) together with a statistical language model. We achieve a user-independent word error rate of 11% for a 8K vocabulary based on an experiment with nine users.